Furnace-grate



' (No Model.)

M. H. MOSKOVITS.

FURNACE GRATE.

Patented July 30, 1889. Fig.1.

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UNITE STATES ATENT QFFICE.

MAXIMILIAN H. MOSKOVITS, OF KANSAS CITY, MISSOURI.

FU RNACE-G RATE.

SPECIFICATION forming part of Letters Patent No. 407,873, dated July 30,1889.

Application filed January 29, 1-889 Serial No. 297,908. (No model.)

To (LZZ whom it may concern.-

Be it known that I, MAXIMILIAN H. MosKowas, of Kansas City, Jacksoncounty, Missouri, have invented certain new and useful Improvements inFurnace-Grates, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof.

This invention relates to an improvement upon Patent No. 382,104,granted to me May 1 1, 1888; and it consists in the novel constructionand combination of the various parts, as will be more fully hereinafterspecified.

In the drawings forming part of this specification, Figure 1 is a planView of my im proved grate. Fig. 2 is a front view of the same. Fig. 3is a side view. Figeis atransverse section of one of the grate-bars,taken on the line 00 0c of Fig. 1; and Fig. 5 is a detail view of thebearing.

Referring to the drawings, in which similar letters of referenceindicate corresponding parts, A indicates one of my improved gratebars,which consists of a series of parallel zigzag webs c 0, (usually threein number,) united at their ends with a web or end piece 0, and bracedat suitable intermediate points by the connecting ribs or webs b, and astraight longitudinal supporting-web a, cast integral with the underside of upper part at about the middle of the same and extending itse11- tire length. The web a is connected with the central zigzag web 0by the connecting-pieces a, by which construction a series of holes orapertures h h are formed, through which air may be fed to the fuel uponthe grate-bar. To prevent the accumulation of ashes, clinkers, and thelike upon the web a, I bevel or cut away the same, as shown at Z, Figs.2 and 4., and I usually alternate such beveled parts, as most clearlyshown in Fig. 2.

From the foregoing it will be seen that a grate-bar is formed which canbe more cheaply and easily constructed, and one which can be veryquickly arranged in conjunction with the adjacent bars to form acomplete grate.

The advantages of this construction over that shown in my Patent No.382,10-1t are that only one supporting-web is necessary for three zigzagwebs composinga comparatively large fire-surface. I-Ieretofore thezigzag webs of grates have been made comparatively thick and heavy intransverse section, preventing the use of any great number of them inmaking up a fire-surface. This of course has also operated toreduce theair-space? and hinder combustion to a corresponding degree. In myimproved grate a large fire-surface is provided by employing a minimumweight of iron, having ample air-space, and yet its airopenings aresufliciently small to prevent'dropping of fuel to the ash-pit. Thus itis that a fire-surface of a given area is provided with only one-thirdof the number of supporting-webs, and hence one-third less obstructionis oifered tothe upward passage of air. Further, much less obstructionis offered to ashes and clinkers falling through the grate, and theimproved construction, taken as a whole, resulting in better combustionof fuel, decreased necessity for stirring the fire, and slight danger ofburning the grate, which last fact is self -evident,- as the quantity ofiron to be kept cool is comparatively small and the air-space providedis proportionately large. The small amount of iron required is perhapsbest illustrated by the fact that in the older grates (where asupporting-web is provided for every zigzag web) the supporting-webswere only about one and one-half inch apart, while in the present casethey are separated fully four inches. In other words, a grate-surface ofa given area now requires but one-third as many supporting-webs as haveheretofore been necessary.

The grate-bars A A are supported at each end upon a knife-edge bearingG, each bearing G working in an angular recess 9, formed in the underside of the end web-pieces c c. It is of course obvious that the severalbars may be provided with any other suitable form of end journals orbearings that will permit of imparting to them a rocking movement.

The knife-edge bearings G G are formed upon the upper sides of thesupporting bars or beams O G. Said bars, running parallel with the sidewalls of the fire-box and extending the entire length of the same, aresecurely held at their rear ends in the bridgewall H, as clearly shownin Fig. 3. WVhenever it is deemed necessary, these supporting-bars C Cmay be braced by a cross-rod cl and suitable nuts d.

At a short distance forward of the bridgewall H the bars 0 C areprovided with an upwardly-extendin g portion, to which secured the rigidzigzag grate-bar B, which forms the extreme rear end of the grate.

To operate the rocking grate-bars, I employ a rod E or E, said rod beingsecured at its rear end between the 'Vertically-depending lugs or ears 9g, formed upon the under side of the web a, and at its front end thisrod is pivotally connected with an operating-lever D or D at c, saidlevers being fulcrumed between the lugs 1c of the plate f. Of course,however, the operating-levers may as well be pivoted to the front plateof the furnace, which would not change the operation and results. Therod E is usually connected with the front grate-bars, while the rod E isconnected with the rear grate-bars. By this arrangement I am enabled tooperate one section of the grate either independently pf or inconjunction with the other section, asmay be desired.

The operation of my device is as follows: The fuel being fed in theusual manner, the combustion is more complete at the rear part of thegrate, and the fuel will burn away more rapidly. By operating the leverD the front bars of the grate are rocked, feeding the fresh fuel to therear of the grate. The air, entering the fire-box as usual, passes alongunder the grate and through the zigzag openings formed between thezigzag webs c c. The Webs a a, being perforated at h, allow the air topass freely through the fire-box and up through the grate. Whenever itis desired to shake the grate, the levers D and D are operatedsimultaneously, and the grate is cleared of all ashes, clinkers, and thelike. The web a, being beveled, as shown and described, prevents theashes and clinkers from accumulating upon the same, as is commonly thecase in other grate-bars. I

Having thus described my invention, what I claim, and desire to secureby Letters Patent,

l. The improved grate-bar havingan upper fire-surface composed of aseries of zigzag webs c c, which are united at their ends, the endweb-pieces c c, and the lower straight longitudinal supporting-web castintegral with the upper zigzag webs and the end pieces, saidsupporting-web being connected .with the series of zigzag webs by meansof connecting-pieces 0., whereby a series of airpassages h h are formedbetween said upper series of webs and the said supporting-web,substantially as described.

2. The improved grate-bar having an upper fire-surface composed of aseries of zigzag webs c c, which are braced at points intermediate oftheir lengths by short transverse webs b b and united at their ends, theend web-pieces c c, and the lower straight longitudinal supporting-webcast integral with the upper zigzag webs and the end pieces, saidsupporting-web being connected with the series of zigzag webs by meansof connectingpieces a, whereby a series of air-passages h h are formedbetween said upper series of webs and the supporting-web, substantiallyas described.

In testimony whereof I affix my signature in presence of two witnesses.

MAXIMILIAN H. MOSKOVITS,

WVitnesses:

F. G. FISCHER, A. A. HIGDON.

